Build an Instagram-like app for posting images with comments.
The app comprises three view controllers: a feed, an upload page and a login page. The designs to follow will illustrate and specify the design and relationship of these view controllers. The backend is powered by Firebase. We will be working in a shared environment, reading and writing from the same database and storage area. This is not unlike a real-world organization where, as a developer, you don't have full control of the data and therefore need to program defensively. Someone might create an incomplete object or fail to establish a necessary connection between objects.
In contrast to the Unit 6 Project App which allowed limited anonymous usage, this app will require the user to log in before he/she can access the rest of the app.
Each post in the feed has two elements: a picture and a comment. The picture is a fixed square the width of the device and the text is variable height below it, resulting in non-uniform cell heights. Therefore use Auto Layout to drive automatic cell heights.
- Includes all assets needed
- Includes the GoogleService-Info.plist needed to connect to Firebase
- Includes all necessary Firebase Pods
- Includes SnapKit
- Includes the default Storyboard. You can edit it to add your interface or build your interface programmatically
Email/Password authentication is enabled so you can register and log users in. Anonymous authentication is also enabled in case you need to fall back to it.
The simple schema is illustrated by this diagram:
The file structure of the storage is illustrated here:
Note the relationship between image names and objects in the database.
Be sure to render your images into compressed JPEG format as we did in the review.
Here's a line of code that takes a UIImage and generates a Data object
with JPEG data.
let image: UIImage = ...obtain uiimage somehow...
let data = UIImageJPEGRepresentation(image, 0.5)
